C&C portfolio building - mostly cave diving

Hi there! Over the past year I've been working on building a portfolio up. Most of my work has been done while cave diving in central Florida. I've had some work published in a cave diving specific magazine, and I'd like to continue that trend and try to get more work published in diving magazines that reach a broader spectrum. Please give me some feedback on how I can improve my work further. I am looking at a camera upgrade in the future, but for now I am using what I have/can afford.

So sorry, new to this forum, and now I see that I'm only supposed to post one photo at a time. If you could, give me some feedback on the first shot. Shot in Ginnie Springs (Devils cave system). I used a sigma 20mm at I believe f5.6 at 1/80th. With a DS125 and DS51 onboard, and a slaved DS125 which my model is holding to illuminate behind himself. How can I improve and take images like this one to the next level so to speak using this one as an example. Thanks!

the first shot is good, but using a light modifier (diffuser) should result in less of a hot spot from the flash and more dispersed light. The point of focus becomes the sign on the ground due to the way the lighting is.

Hi, nice photos in a tricky environment. Good job on the off camera lighting,

I would suggest taking the classic underwater rule underground too - shoot up. Even if there's only a roof instead of a surface, it's a good angle.

You have a lot more lighting control in caves, so experiment lots. Silhouettes look good, and backlighting and reflective ceiling bubbles can be lots of fun. It looks like you have a patient buddy there...get him wearing as much colour as possible to help you out. Black suits are really tricky.